Fragmentation of spin-dipole strength in 90Zr and 208Pb

被引：39
作者：
Marketin, T. [1 ]
Litvinova, E. [2 ,3 ]
Vretenar, D. [1 ]
Ring, P. [4 ]
机构：
[1] Univ Zagreb, Dept Phys, Fac Sci, Zagreb 10000, Croatia
[2] GSI Helmholtzzentrum Schwerionenforsch, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany
[3] GSI Helmholtzzentrum Schwerionenforsch, Div Res, D-64291 Darmstadt, Germany
[4] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany
来源：
PHYSICS LETTERS B | 2012年 / 706卷 / 4-5期
关键词：
Covariant density functional theory; Particle-vibration coupling; Nuclear charge-exchange excitations; NEUTRON SKIN; EXCITATION; NUCLEI; RESONANCES; SCATTERING; DENSITY;
D O I：
10.1016/j.physletb.2011.11.050
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
An extension of time-dependent covariant density functional theory that includes particle-vibration coupling is applied to the charge-exchange channel. Spin-dipole excitation spectra are calculated an compared to available data for Zr-90 and Pb-208. A significant fragmentation is found for all three angular-momentum components of the spin-dipole strength as a result of particle-vibration coupling, as well as a shift of a portion of the strength to higher energy. A high-energy tail is formed in the strength distribution that linearly decreases with energy. Using a model-independent sum rule, the corresponding neutron skin thickness is estimated and shown to be consistent with values obtained at the mean-field level. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：477 / 481
页数：5
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